Deflection yoke mount

ABSTRACT

A mount for holding a deflection yoke in operating position in relation to a kinescope. An outer housing fixedly mounted on the kinescope provides bearing surfaces for an inner housing which is adapted to being positioned axially and rotatably within. The inner housing contains a holding member into which a yoke is fixedly mounted and which member snaps into the inner housing.

' [451 Oct. 10, 1972 United States Patent Christensen, II et al.

[541 DEFLECTION YOKE MOUNT 3,404,228 lO/l968McLeodetal.............l78/7.8

[72] Inventors: Edward Walter Christensen, II, In-

dianapolis; Ronald Dale EuDaly, Primary ExammerGeorge Harris southpon,both f 1 d Att0rney-Eugene M. Whitacre [73] Assignee: RCA Corporation I[57] ABSTRACT A mount'for holding a deflection yoke in operating [22]Filed: Jan. 15, 1971 [21] Appl. No.: 106,778

position in relation to a kinescope. An outer housing fixedly mounted onthe kinescope provides bearing surfaces for an inner housing which isadapted to being positioned axially and rotatably within. The

[52] US. Cl...................................335/2l0, l78/7.8l

[51] Int. 7/00 l78/7.8, 7.81; 335/210, 212;

inner housing contains a holding member into which a yoke is fixedlymounted and which member snaps into th i n h si .-v

[58] Field of Search [56] References Cited UNITED STATES PATENTS 7Claims, 5 Drawing Figures Obertet m K WIIIWI'IL PATENTEDUIII 10 m23.697; 909

SHEET 1 OF 2 I N VEN TORS Edward 14 Christensen 17 ATTORNEY PATENTEDum10 1912 I 3.697.909

sum 2 OF 2 INVENTORS Edward W. Christensen 17; Ronald D. EuDaly.

CQMQ ATTORNEY DEFLECTION YOKE MOUNT BACKGROUND OF THE INVENTION Thisinvention relates to an improved mount for holding a deflection yoke inoperating position relative to a kinescope.

In television receivers it is customary to deflect the kinescopeelectron beam to form a raster scan by means of an electromagneticdeflection yoke which is energized by appropriate current sources at theline and field scanning rates. Particularly with regard to multiple beamcolor kinescopes, the deflection yoke must be positioned accuratelyaround the kinescope to effect the desired deflection and convergence ofthe beams for producing a satisfactory color picture. Thus, it isdesirable that the yoke mount be designed such that the yoke containedtherein can be moved axially and rotatably along and around the centralaxis of the kinescope and then be secured after the desired positioningis determined.

According to the invention, an adjustable mount for holding a deflectionyoke in operating position relative to a kinescope comprises an outerhousing adapted to be securely attached to the kinescope and an innerhousing assembly fitting within the outer housing. The inner housing isadapted to slide and rotate coaxially within the outer housing. Frontand rear holding members are adapted to grasp the deflection yokesecurely and are fixedly fitted into the inner housing by indexing andretaining means. Clamping apparatus is provided for securing the innerand outer housings together when the yoke is in the desired position.

A more detailed description of the invention is given in thespecification and accompanying drawings of which:

FIGS. 1a 1d comprise a disassembly view illustrating the component partsof a deflection yoke mount according to the invention; and

FIG. 2 is a cross-sectional assembly view of the deflection yoke mountillustrated in FlG. 1.

DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION FIGS. lathrough 1d comprise a view illustrating the disassembled component partsof a deflection yoke mount according to the invention. FIG. laillustrates an outer housing assembly which is suitable for mountingagainst a kinescope. Outer housing 10 includes a plurality of fingers 11extending from a front portion of the housing. Adhesive pads 12 whichhave an adhesive layer on both sides are attached to fingers 11 formounting outer housing 10 to a flared bulb envelope portion of akinescope. Outer housing 10 also includes front and rear cylindricalbearing surface portions 13 and 14 for containing an inner housing to bedescribed subsequently. A plurality of clamping brackets 17 are adaptedto bridge slots 16 in outer housing 10 and to slide axially over theslots. Clamping bracket 17 has a slot through which a clamping bracketscrew 18 may pass. A rear portion of outer housing 10 includes aplurality of compressible fingers which form a hole through which theneck of the kinescope passes. Fingers 15 provide compressible forceradially against a neck portion of the kinescope which in conjunctionwith adhesive pads 12 serve to fixedly hold the outer housing 10 to thekinescope.

FIG. lb illustrates the inner housing portion of a deflection yoke mountaccording to the invention. Inner housing 20 includes cylindrical frontand rear portions 24 and 23 respectively which fit against the bearingsurfaces 13 and 14 of FIG. In such that inner housing 20 may be movedaxially and rotatably within outer housing 10. Inner housing 20 alsoincludes retaining a plurality of retaining tabs 21 extending from thefront cylindrical portion 24. Retaining tabs 21 serve to engage a frontholding plate to be described subsequently. The front cylindricalmember24 of inner housing 20 also contains a plurality of slots 22 forengaging with clamping means to be described subsequently.

FIG. 1c illustrates a rear holding plate 30 which is adapted to fitagainst the rear portion 23 of inner housing member 20. Radially spacedfrom the central axis of rear holding plate 30 are a plurality ofcentering members 31 extending from the rear holding plate and whichserve to center the deflection yoke at the rear of the mount. The centerhole in rear holding plate 30 is large enough to accept the neck portionof a kinescope.

FIG. 1d illustrates a front holding plate 40 and front and rear ringmembers 47 and 50, respectively, suitable for holding a deflection yoke.Front holding plate 40 includes a plurality of clampling nuts 42attached to clamping nut supports 43 extending rearwardly of the fromholding plate. Clamping nuts 42 are positioned to fall within slots 22of inner housing 20 shown in FIG. lb. For preventing rotational movementbetween front holding plate 40 and inner housing 20 further as is moreclearly shown in FIG. 2 clamping screw 18 extends through the indexingslots 22 of inner housing 20 to engage with the clamping nut 42 of thefront holding plate 40. Front holding plate 40 also includes a pluralityof indexing tab receiving members 45 spaced to receive indexing tabs.

Shown rearwardly of front holding plate 40 in FIG. id is a front ringmember 47 which fits snugly over the front portion of a ferrite core 46such that there is no rotational movement between the front ring member47 and the core 46. Spaced around the outer circumference of front ringmember 47 are a plurality of indexing tabs 48 which fit into the slotsdetermined by indexing tab receiving members 45 of the front holdingplate. Thus, when the front ring member 47 is engaged with the frontholding plate 40 rotational movement between the two pieces is'preventedand the front ring member 47 cannot move forward of the front holdingplate 40.

Rearwardly of the front ring member 47 of FIG. ld is a rear ring member50. Rear ring member 50 is adapted to fit snugly over the rear portionof ferrite core 46 for preventing relative movement therebetween.Extending across the rear of rear ring member 50 are a plurality ofslots 51 which serve to index the windings of the conductors woundaround ferrite core 46. Although not shown in this view the frontportion of front ring member 47 has a plurality of slots similar to rearring member 50 such that the conductors can be accurately positionedangularly around ferrite core 46.

FIG. 2 illustrates a cross-sectional assembly view of the deflectionyoke mount illustrated in FIG. 1. The yoke mount assembly is shown forillustrative purposes, to be fitted around a kinescope 60, with thefront portion of the mount adjacent a flared bulb 61 of the kinescopeand with the rear portion adjacent a neck portion 62 of the kinescope.The assembled yoke description will be given starting from the rightside and going to the left. The outer housing has its fingers l l withtheir respective adhesive pads 12 mounted against the flared bulbportion 61 of the kinescope 60. The inner housing 20 is fitted coaxiallywithin the outer housing 10 against the bearing surfaces 13 and 14.Contained to the left of the retaining tabs 21 of inner housing 20 isfront holding plate 40. Referring to the top of FIG. 2 it can be seenthat clamping screw 18 passes through the slot in clamping bracket 17and engages with the clamping nut 42 held by clamping nut supports 43 ofthe front holding plate 40. Centered upon front holding plate 40 byindex tab receiving members 45 is the front ring member 47. Aspreviously mentioned, front ring member 47 is to be fixedly retained byfront holding plate 40.

As previously described a ferrite deflection yoke core 46 is snuglyfitted within front ring member 47. A rear ring member 50 is similarlysnugly fitted over the rear portion of ferrite core 46. The back of rearring member 50 abuts rear holding plate 30. The centering members 31 ofrear holding plate 30 fit within the inner circumference of rear ringmember 50 to center it.

Rear holding plate 30 abuts the back portion of inner housing 20 and isheld coaxially centered therein by the bearing surface 23. Thus, theassembly comprising rear holding plate 30, rear ring member 50, ferritecore 46 and front ring member 47 is held fixedly within inner housing 20by the front holding plate 40, the retaining tab slots 44 of whichengage with the retaining tabs 21 of the inner housing 20. Conductors 52are shown wound around the core 46 and front and rear ring members 47and 50 for forming toroidal vertical and horizontal deflection yokewindings. Taps are made to the conductors by bringing predeterminedconductors out through the tap members 49 of front ring member 47Ferrite core 46 may be of one piece construction as is commonly usedwith toroidal yokes. The conductors 52 are held by the radial slots, notshown in FIG. 2, for yielding the predetermined desired conductorwinding distribution of the toroidal yoke.

The rear portion of outer housing 10 is held firmly against and centeredaround the neck portion 62 of kinescope 60 by the plurality ofcompressible fingers 15 which provide a force against the neck of thekinescope.

At the top of FIG. 2 the clamping assembly for securing movement betweenthe inner and outer housing is shown. Clamping screw 18 extends throughthe slot in clamping bracket 17 and engages with clamping nut 42attached to clamping nut support 43 of front holding plate 40. Toposition the inner housing assembly axially and rotatably within theouter housing, clamping screw 18 is loosened and the inner housing 20 ismoved to the desired position. Clamping screw 18 is then tightened andthe entire assembly including the deflection yoke is fixedly held inoperating position relative to kinescope 60. With the exception of themetal clamping screw assembly and the adhesive pads the entire yokemount assembly may be made of a plastic material such as a thermoplasticresin. it should be noted that with the exception of the clamping screwassembly the component parts of the yoke mount assembly are fitted andlocked one to another by their integral structure. This eliminates theneed for additional metal parts for centering and locking the assemblyrelative to the kinescope and for centering and holding the deflectionyoke within the mount.

The deflection yoke mount has been described as suitable for containinga toroidal yoke. However, it is to be understood that the yoke mount mayreadily be adapted to contain a deflection yoke comprising vertical andhorizontal saddle type deflection coils. To accomplish this the frontand rear holding plates 40 and 30 would be designed to fit snugly overthe front and rear portions of the saddle type coils and ferrite coreassembly.

It should be noted that the relatively large portion of rear holdingplate 30 which is not abutting the rearmost portion of inner housing 20may be utilized for mounting circuit components such as yoke dampingresistors, temperature compensation elements or capacitors. Rear holdingplate 30 may be utilized efficiently for this purpose as it is in closeproximity to the yoke winding conductors.

What is claimed is:

1. An adjustable mount for holding a deflection yoke in operatingposition relative to a kinescope, comprising:

outer housing means including means for attaching said housing to saidkinescope;

inner housing means sitting coaxially within said outer housing meansand adapted to slide axially and rotatably therewithin;

front holding member means adapted to engage a front portion of saidyoke such as to prevent rotational movement and axial movement in afirst direction between said front holding member means and said yoke;

rear holding member means adapted to engage a rear portion of said yokefor coaxially aligning said rear holding member means and said yoke;

said inner housing means including retaining means for retaining saidrear holding member means and for fixedly retaining said front holdingmember means such that said yoke is held fixedly within said innerhousing means; and

clamping means for preventing undesirable movement between said innerand outer housing means.

2. An adjustable mount for holding a deflection yoke in operatingposition relative to a kinescope, comprising:

outer housing means including means for attaching said housing to saidkinescope;

inner housing means sitting coaxially within said outer housing meansand adapted to slide axially and rotatably therewithin;

front holding member means adapted to engage a front portion of saidyoke such as to prevent rotational movement and axial movement in afirst direction between said front holding member means and said yoke;

rear holding member means including means adapted to engage a rearportion of said yoke for and said yoke;

said inner housing means including retaining means including tabsextending from a front portion of said inner housing means for retainingsaid rear holding member means and for fixedly retaining said frontholding member means such that said yoke is held fixedly within saidinner housing means;

said front holding member means includes slots through which said tabsextend for positioning said front holding member means relative to' saidinner housing means and for fixedly retaining it thereto; and

clamping means for preventing undesirable movement between said innerand outer housing means.

3. An adjustable deflection yoke mount according to claim 2 wherein saidfront holding member means includes a first front ring member which fitsover a front portion of the ferrite core of said yoke and which firstfront ring member includes indexing tabs for engaging with indexing tabreceiving portions of a second front ring member for preventingrotational movement therebetween, said second front ring memberincluding said slots for engaging with said tabs of said inner housingmeans.

4. An adjustable deflection yoke mount according to claim 3 wherein saidrear holding member means includes a first rear ring member which fitsover a rear portion of the ferrite core of said yoke and a second rearmember which has centering portions which engage with said first rearring member for centering said yoke relative to said second rear ringmember, said second rear ring member being adapted to be received withinsaid inner housing by said rear holding member retaining means.

5. An adjustable deflection yoke mount according to claim 4 wherein saidfirst front and rear ring members are adapted to receive conductors ofsaid yoke windings for positioning the successive conductor windingsrelative to each other.

6. An adjustable mount for holding a deflection yoke in operatingposition relative to a kinescope, comprising:

outer housing means adapted to encircle said kinescope and remain infixed position thereto by gripping means disposed at the front and rearof said housing means, which means securely fasten said housing means tosaid kinescope; inner housing means fitting coaxially within said outerhousing means and adapted to be moved axially and rotatably therewithin,said inner housing means including means for retaining a rear holdingmember means, and indexing means for fixedly retaining a front holdingmember means; rear holding member means adapted to engage a rear portionof said yoke; from holding member means adapted to engage a frontportion of said yoke, said rear and front holding member means fittingwithin said rear retaining means and said indexing means respectively,for fixedly holding said yoke within said inner housing member; andmeans securing said inner and outer housing means for preventingundesired movement therebetween. 7. An adjustable mount for holding adeflection yoke in operating position in relation to a kinescope,comlng! outer housing means encircling said kinescope and fixedlymounted thereto by adhesive pads attached to fingers extending from saidhousing at one end thereof and by compressible fingers extending fromthe other end thereof to provide a force to center the other end about aneck portion of said kinescope; inner housing means mounted within saidouter housing means such as to be positioned axially and rotatablytherewithin and including means for receiving front and rear holdingmember means; front holding member means adapted to be positionedfixedly within said inner housing means by said front receiving means;rear holding member means adapted to be positioned within said innerhousing means against said rear receiving means; front and rear yokeretaining means adapted for fixedly engaging said yoke and for fixedlyengaging with said front holding means and for centering said yoke inrelation to said rear holding member means, respectively; and means forclamping said inner housing means to said outer housing means forpreventing undesirable movement therebetween.

1. An adjustable mount for holding a deflection yoke in operating position relative to a kinescope, comprising: outer housing means including means for attaching said housing to said kinescope; inner housing means sitting coaxially within said outer housing means and adapted to slide axially and rotatably therewithin; front holding member means adapted to engage a front portion of said yoke such as to prevent rotational movement and axial movement in a first direction between said front holding member means and said yoke; rear holding member means adapted to engage a rear portion of said yoke for coaxially aligning said rear holding member means and said yoke; said inner housing means including retaining means for retaining said rear holding member means and for fixedly retaining said front holding member means such that said yoke is held fixedly within said inner housing means; and clamping means for preventing undesirable movement between said inner and outer housing means.
 2. An adjustable mount for holding a deflection yoke in operating position relative to a kinescope, comprising: outer housing means including means for attaching said housing to said kinescope; inner housing means sitting coaxially within said outer housing means and adapted to slide axially and rotatably therewithin; front holding member means adapted to engage a front portion of said yoke such as to prevent rotational movement and axial movement in a first direction between said front holding member means and said yoke; rear holding member means including means adapted to engage a rear portion of said yoke for coaxially aligning said rear holding member means and said yoke; said inner housing means including retaining means including tabs extending from a front portion of said inner housing means for retaining said rear holding member means and for fixedly retaining said front holding member means such that said yoke is held fixedly within said inner housing means; said front holding member means includes slots through which said tabs extend for positioning said front holding member means relative to said inner housing means and for fixedly retaining it thereto; and clamping means for preventing undesirable movement between said inner and outer housing means.
 3. An adjustable deflection yoke mount according to claim 2 wherein said front holding member means includes a first front ring member which fits over a front portion of the ferrite core of said yoke and which first front ring member includes indexing tabs for engaging with indexing tab receiving portions of a second front ring member for preventing rotational movement therebetween, said second front ring member including said slots for engaging with said tabs of said inner housing means.
 4. An adjustable deflection yoke mount according to claim 3 wherein said rear holding member means includes a first rear ring member which fits over a rear portion of the ferrite core of said yoke and a second rear member which has centering portions which engage with said first rear ring member for centering said yoke relative to said second rear ring member, said second rear ring member being adapted to be received within said inner housing by said rear holding member retaining means.
 5. An adjustable deflection yoke mount according to claim 4 wherein said first front and rear ring members are adapted to receive conductors of said yoke windings for positioning the successive conductor windings relative to each other.
 6. An adjustable mount for holding a deflection yoke in operating position relative to a kinescope, comprising: outer housing means adapted to encircle said kinescope and remain in fixed position thereto by gripping means disposed at the front and rear of said housing means, which means securely fasten said housing means to said kinescope; inner housing means fitting coaxially within said outer Housing means and adapted to be moved axially and rotatably therewithin, said inner housing means including means for retaining a rear holding member means, and indexing means for fixedly retaining a front holding member means; rear holding member means adapted to engage a rear portion of said yoke; front holding member means adapted to engage a front portion of said yoke, said rear and front holding member means fitting within said rear retaining means and said indexing means respectively, for fixedly holding said yoke within said inner housing member; and means securing said inner and outer housing means for preventing undesired movement therebetween.
 7. An adjustable mount for holding a deflection yoke in operating position in relation to a kinescope, comprising: outer housing means encircling said kinescope and fixedly mounted thereto by adhesive pads attached to fingers extending from said housing at one end thereof and by compressible fingers extending from the other end thereof to provide a force to center the other end about a neck portion of said kinescope; inner housing means mounted within said outer housing means such as to be positioned axially and rotatably therewithin and including means for receiving front and rear holding member means; front holding member means adapted to be positioned fixedly within said inner housing means by said front receiving means; rear holding member means adapted to be positioned within said inner housing means against said rear receiving means; front and rear yoke retaining means adapted for fixedly engaging said yoke and for fixedly engaging with said front holding means and for centering said yoke in relation to said rear holding member means, respectively; and means for clamping said inner housing means to said outer housing means for preventing undesirable movement therebetween. 